Tuning coupler



UUUUUUUUUUU ER '4: am pun R. W. AUGUSTINE TUNING GOUPLER Dec. 21 1926. 1,611,151

Filed May lO, 1922 2 Sheets-heet 2 ying` bei; shown in dotted lines 1 ,Y Patenten Een .219

Ulil'lfE STATES 1,611,151 PATENT OFFICE.

RGY W. AUGUSTINE, OF GAK EAFE, ILLNCIS, ASSGIGR TO JOYKELSEY CORPORA- TION, OF CHCAG-O, LL'tTOI TUN 111'@V Application lled May 10,

tion in Whichl? 1 ie ieee View of the device; Fig. 2 is a side elevation or ne cover and el apparatus inoun thereon With the enclosted l ro is a octroie vieu oi rig. l,

il 4 is a rear View i' 1;

.t` a is a transverse sectional 'vieu'- along;` the line ot Fig. 1;

Fig. l in a sectional View along` the line 'Gn-( of 1, and

iatieaily the i' non' 'riore in detail to the device ."rated- 1tcomprises a lace or mount- Which also acts a cover for le box, hai/ing ay coupler B vith a gradinted dial 1 en the rare. Said dial 11 and knob 12 a 'ed to a shaft 13 carrying' a Wiper 1x to the lower end thereof. The

i." supported in a bearing corna il; nged sleeve held by nut le f ,h also ais to clamp the Wii''er stop l? rear oli' the faire plate 10.

' he coupler ie constructed in an improved and simnlii'ied manner, consisting o'f two windings the Jnrimary windings: is directly engaged by thev rotatable Winer and to thin end is preferably ot an elliptic shape so as to present a surface more readily cooperwith the rotatable Wiper. While -pro- Linie' a coil of lees transverse area. 11o, by usine` a. curved support 'for the Wires such as the elliptic shape specified, the Windines are maintained more taut than on a re tube.. 1n building` up the coupler l preferably use an oval tube 18 made up of insulatingf material preferably et rolled Bedford paper dipped in a suitable insulating' and holding substance such as shellac.

A @GRECI-A111101? OF ILLINOIS.

CUPLER.

1922. Serial N0. 559,825.

i. then Wind the primary and secondary windings et the coupler on this tube preferably in so-ealled Varley fashion, that is usingV a rnate conyolutions of bare and insulated Wire, the bare Wire being' the primary windingl 19 and the secondary, the insulated Wire 20. rllhe primary Winding being' preferably directly engaged by the tuning Wiper to the exclusion or' the secondary Winding l here the primary vinding pro ject above the secondary Winding` so that the Wiper engages the primary only. To this end l preferably employ a larger gauge for 'the primary Winding so that it stands higher than the secondary.

Although l use alternate convolutions olf l are and insulated Wire7 this is the preferred construction because l thus use the minimum space although it Will be apparent that the coils may be Wound in other Ways and still ee'fure the snacing oi' the windings so that one only will be engaged by the'wiper and also secure the necessary insulation. For enaingle, l also use an enameled insulated Winding for the contacting` coil and scrape the insulation olf along Where the Wiper engao'es.

in adjusting; the Wiper 14 so as to cut in or out the desired number of convolutions or the primary7 the movement thereof is limited by the downwardly extending' stop arms l?. Also the spring action of the wiger 111 is such as to assist in giving a fricJA onal action to the bearing ol the Wiper -fr 'the Winding@` oli the coupler B one end oiE the primary Winding is left disconnected., that is open, and the other end, that the co.n uectingg` end 19 terminates in a binding; poet .il to Whidi the antenna or the aerial connected. The tuning' wiper 14 is connected to the ground binding post G by means e bus bar 23 which is clamped between the tace plate and the stop 17 so that it is in electrical connection with the Wiper 14; through the various elements as more clearly shown .in Fig. 5.

The secondary Winding of the coupler and which .is the insulated Winding has its end 20 connected to one terminal of the usual condenser Qt.; While the other end 202 oli the secondary is connected to the crystal spring; contact post at Q5. The other terminal of the crystal detector, that is terminal a cap Bel. The holder 38 carries a spring` contact holder rod slidalole in the ineinlier This nieniloer 33 is slotted at 53 so as to yieldingly engage 'they rod 35 whereby this rod is held in its longitudinally adjusted The spring contact 36 is thus position. adapted tor 1oe adgusted universally into err gagenient with any point on the Aface oi' the crystal 37. :i crystal holder 38 is `provided being a cup-ShaperL nieinoer har; a plurality of set scre vs 39 adapted to engage and hold the crystal 37 in plac ln the opera-tion oi the apparatus the terminal A is connected to a suitable ant nua rininal to ground. if. sui

or aerial and te able high res ance telephone receiver' T is connected across terminals E27-r29- The del. Vice is nor-v tuned by adjusts@ the Wiper lll inoving ie' across the turns oi the priinary 19 intil properly adjusted to the wave length to be received, also, ot course, securvw ing props' adjust-nient of 'the crystal contact.

llfhat l claiin as new and desire to secure oy United States iietters ljatent is:

l. .ln radio apparatus of the character described, a mounting; plate, a Vlongitudiiial elliptic coil inoiinted on the rear thereof, rotatable dial mounted on tl e Jrace theresY a shalt extendingv through the plate, and a Wiper carri Jd by said shaft `for successive contact engagement with the convolutions of said coil.

2. ln radio apparatus o the character described, a inountin plate, a longitudinal transversely curved urface coil mounted the thereof, a rotatable dial Inoui on the lace thereoii, a sha1 extending ,i the plate, and a Winer carried hy said shaft for successive consact ene'ageinent with the oonif'olutions ot 3. ln radio apparatus o. scribed, a tuning),v Vcoupler G. e: S

having primary and secondary Win-diras, tln, Wire of one i than the Y comprising layer placed upon a n' straight faced core With the priinaiy and Winding being or Idialoicter one other, said Wind; a si r 'l suitable lonoitud secondary c-onvolutions alternately posiA tioned along` the lace of the core each in intiniate ContactI therewith.

l. In radio apparatus of the character c escrilied, mounting plate, lo igitudinal coil nioinited on the rear th reoll having a layer consisting oit tw windings a rotatable dial mounted on the 'lia-ce thereof, a shaft extending through the plate, and a Wiper carried by said shalt lor successive Contact engagement with the convolutions of said coil, said coil bei ig elliptic in cross-section and said Wiper shaft axis heilig perpendicular to the majo ont the ellipse, one i indl a r 'ing e of the convolrtions above ther iviiidi i."

i and said shalt ari? axis oi actinf l COD c utions V-iie 'v'nding loc, here. and the coi,-yolutioiis ofthe other :vindii being insulated, whereby tlc ha 'e coni'olutioi s niay ce directly electricallv engaged ""or cultingl in and out trie d ^"'ed nin lier oi convolutioiis, and a ovalile across the coil -lor engagement r i the bare convolir L.

Lr? i 1 coil .Y vlilo inroni nd i, enfl -'i .Y sp'ndle is turned, aad ni s i spindle anc switch n il sub'scioe iny naine Vl), i9.

, 1 .l I e plate, said coil s-eii f 

